<script setup>
import MyBox from './components/MyBox.vue';
import {ref} from "vue"
const count = ref(0)

const obj= {
  count:0
}
</script>
<template>
  <h1>我是app的根组件</h1>
  <MyBox :count="count"></MyBox>
  <button @click="count++">点我一下</button>
</template>